摘要
目的探讨拔除上颌切牙及下颌双尖牙进行正畸治疗病例的正畸治疗特点。方法采用回顾性研究的方法,对11名由于各种原因需要拔除上颌切牙并同时需要拔除下颌双侧第一双尖牙进行正畸治疗的患者进行研究。用电子游标卡尺进行模型测量,通过模型测量计算 Bolton 指数分析该类患者拔牙治疗后上下颌牙量的协调性。并通过患者的正畸治疗总结该类患者的治疗特点及矫治要点。结果:该类患者治疗后的 Bolton 指数分别为前牙比79.71%、后牙比91.75%,虽大于正常均数,但差异不大。11名患者上下颌牙量的不调量在0.5—2.82 mm 间。结论:拔除上颌切牙及下颌双尖牙治疗的患者,上下颌牙量基本协调.恰当的正畸矫治可以使患者获得良好的矫治效果。
Objective To investigate the characteristics of the orthodontic treatment in the patients with the extraction of upper incisors and lower premolars and the morphological changes in dento-facial structures after orthodontic treatment. Method A retrospective study of 11 orthodontic patients who had upper incisor and lower premolar extractions was carried out. Electronic vernier caliper was used to measure the tooth size on the dental cast and Bolton index was calculated for each patients. Result After orthodontic cneatment, the anterior ratio and the overall ratio were 79. 71% and 91. 75%, respectively. The inter arch tooth-size discrepancy was 0. 5-2.82mm. Conclusion The Bolton index in patients with upper in cisor extractions was close to the average normal value and the patients could have good treatment outcome. The profile of the patients changed after orthodontic treatment.
出处
《口腔正畸学》
2008年第4期145-148,共4页
Chinese Journal of Orthodontics
关键词
拔牙
切牙
正畸
extraction
upper incisor
orthodontics
